classfilenamefilter.java

j2me 混淆包,用于混淆j2me的原代码用的

/* $Id: ClassFileNameFilter.java,v 1.8 2004/08/15 12:39:30 eric Exp $
 *
 * ProGuard -- shrinking, optimization, and obfuscation of Java class files.
 *
 * Copyright (c) 2002-2004 Eric Lafortune ([e-mail])
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.visitor;

import proguard.classfile.*;
import proguard.util.*;


/**
 * This <code>ClassFileVisitor</code> delegates its visits to another given
 * <code>ClassFileVisitor</code>, but only when the visited class file
 * has a name that matches a given regular expression.
 *
 * @author Eric Lafortune
 */
public class ClassFileNameFilter implements ClassFileVisitor
{
    private ClassFileVisitor         classFileVisitor;
    private StringMatcher regularExpressionMatcher;


    /**
     * Creates a new ClassFileNameFilter.
     * @param classFileVisitor  the <code>ClassFileVisitor</code> to which visits
     *                          will be delegated.
     * @param regularExpression the regular expression against which class names
     *                          will be matched.
     */
    public ClassFileNameFilter(ClassFileVisitor classFileVisitor,
                               String           regularExpression)
    {
        this.classFileVisitor         = classFileVisitor;
        this.regularExpressionMatcher = new ClassNameMatcher(regularExpression);
    }


    // Implementations for ClassFileVisitor.

    public void visitProgramClassFile(ProgramClassFile programClassFile)
    {
        if (accepted(programClassFile.getName()))
        {
            classFileVisitor.visitProgramClassFile(programClassFile);
        }
    }


    public void visitLibraryClassFile(LibraryClassFile libraryClassFile)
    {
        if (accepted(libraryClassFile.getName()))
        {
            classFileVisitor.visitLibraryClassFile(libraryClassFile);
        }
    }


    // Small utility methods.

    private boolean accepted(String name)
    {
        return regularExpressionMatcher.matches(name);
    }
}